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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Ultrafast fabrication of thermally stable protein-coated silver iodide nanoparticles for solid-state superionic conductors

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Author(s):
Tofanello, Aryane [1] ; Araujo, Juscemacia N. [1] ; Nantes-Cardoso, Iseli L. [1] ; Ferreira, Fabio F. [1] ; Souza, Jose A. [1] ; Lim, Dae-Woon [2] ; Kitagawa, Hiroshi [2, 3] ; Garcia, Wanius [1]
Total Authors: 8
Affiliation:
[1] Univ Fed ABC, Ctr Ciencias Nat & Humans, Santo Andre, SP - Brazil
[2] Kyoto Univ, Grad Sch Sci, Div Chem, Sakyo Ku, Kitashirakawa Oiwakecho, Kyoto - Japan
[3] Kyushu Univ, INAMORI Frontier Res Ctr, Nishi Ku, 744 Motooka, Fukuoka, Fukuoka 8193095 - Japan
Total Affiliations: 3
Document type: Journal article
Source: COLLOIDS AND SURFACES B-BIOINTERFACES; v. 176, p. 47-54, APR 1 2019.
Web of Science Citations: 0
Abstract

Solid-state ionic conductor is an essential and critical part of electrochemical devices such as batteries and sensors. Nano-sized silver iodide (AgI) is the most promising ionic conductor due to its superionic conductivity at room temperature. In recent years, proteins have been used as organic templates to obtain high-performance solid-state ionic conductors as well as to extend their applications in a biosensor. Here, we report the unprecedented ultrafast synthesis of thermally stable protein-coated AgI nanoparticles (NPs) through the photo irradiation method for solid-state electrolyte. The synthesis was performed using a hyperthermostable bacterial beta-glucosidase. The protein-coated AgI NPs with an approximate diameter of 13 nm showed that the controllable transition from the alpha- to beta-/gamma-phase was drastically suppressed down to 41 degrees C in the cooling process. After drying, the product represents a thermally stable organic-inorganic hybrid system with superionic conductivity. It is noteworthy that the superionic conductivity (sigma(-) 0.14S/cm at 170 degrees C) of thermally stable protein-coated AgI NPs is maintained during several thermal cycles (25-170 degrees C). To our knowledge, this is the first report showing the diffusion of mobile Ag+ ions on the surface of the AgI NPs through a protein matrix. The facile synthesis method and high performance of the protein-coated AgI NPs may provide a latent application in the mass production of nanobatteries and other technological applications. (AU)

FAPESP's process: 17/16976-8 - Biophysical and biochemical characterization of two bacterial enzymes Involved in the conversion of ferulic acid to vanillin
Grantee:Juscemácia Nascimento Araujo
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 17/17275-3 - Studies of the mode of action of two lytic polysaccharide monooxygenases from insect (order: isoptera): molecular structure, bioinorganic chemistry and biotechnological applications
Grantee:Wanius José Garcia da Silva
Support Opportunities: Regular Research Grants